A decentralised service composition approach for peer-to-peer video delivery

摘要

Recent platforms for Peer-to-Peer (P2P) based video distribution such as Zattoo and Joost are based on End-Host or Application Layer Multicast techniques. An on demand adaptation of audio/video data to end user terminals or to the transport and error characteristics of the client access technology is not supported. To address such issues in the scale of P2P Networks, we describe a cooperative service provisioning principle (CSP) based on the assumption that selected peers offer processing services to the community. In contrast to recent approaches our main focus in this paper is on the applicability of QoS estimation techniques to decrease time and measurement complexity of CSP. We provide a state of the art in landmark-rnbased delay estimation and introduce a novel technique for landmark-based bottleneck bandwidth prediction showing favourable results for networks with widest path routing.